Anisotropy of ultra-thin ferromagnetic films and the spin reorientation transition

Details Anisotropy of ultra-thin ferromagnetic films and the spin reorientation transition Anisotropy of ultra-thin ferromagnetic films and the spin reorientation transition

2002-02-28

arxiv.org/abs/cond-mat/0202534v1

Phys. Rev. B 66, 024419 (2002)

Physics

Condensed Matter

Materials Science

6 pages, RevTeX4

Scientific paper

10.1103/PhysRevB.66.024419

The influence of uniaxial anisotropy and the dipole interaction on the direction of the magnetization of ultra-thin ferromagnetic films in the ground-state is studied. The ground-state energy can be expressed in terms of anisotropy constants which are calculated in detail as function of the system parameters and the film thickness. In particular non-collinear spin arrangements are taken into account. Conditions for the appearance of a spin reorientation transition are given and analytic results for the width of the canted phase and its shift in applied magnetic fields associated with this transition are derived.

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